I'd be interested to know also. I would imagine if there is any BHP increase that the Secondary Cat delete would be more of a restriction compared to the muffler.
muffler or secondary cat delete
what is better sounding secondary cat delete or a muffler delete 2003 sl 500
also does anyone have anny pictures of this done and if you do the cat delete do you also delete the squished pipe that is after the cat but before the muffler .
also does anyone have anny pictures of this done and if you do the cat delete do you also delete the squished pipe that is after the cat but before the muffler .
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